Easy-to-clean, mechanically stable coating composition for metallic surfaces and process for coating a substrate using said composition

US8137452B2 · kind B2 · utility

Assignees

• Masco Corporation · US
• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Uwe Posset · Cadolzburg, DE
• Gerhard Schottner · Heilsbronn, DE
• Daniel E. Ford · Loomis, US
• Evelyn M. DeLiso · University Heights, US

Key dates

• Filing date: Dec 23, 2005
• Grant date: Mar 20, 2012
• Expiry date: Jan 6, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L83/08
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The present invention is directed to an optically clear coating made from a composition comprising an epoxy-melamine resin. The coating is obtained on a metallic substrate and has a very rigid structure and a unique combination of properties that includes hydrophobicity/easy-to-clean, adhesion to bright chrome, abrasion resistance and chemical resistance. The coating composition comprises (A) a mixture of at least one hydrolysable silane and one hydrolysable metal compound, the compounds of said mixture being partly or fully hydrolyzed and partly or fully condensed, (B) at least one melamine derivative selected from derivatives having formula (C3N3)(NR4R5)3, and derivatives having formula (C3N3)(NR4R5)3-p(NR4R6)p, wherein R4 and R5 are independently selected from H, hydroxymethylene and alkoxymethylene, with the proviso that at least one of the R4 groups is a hydroxymethylene or alkoxymethylene group, and R6 is —CH2—NR4(C3N3)(NR4R5)2 or —CH2—O—CH2-NR4(C3N3)(NR4R5)2, and p is 1 or 2, and either at least one partially or fully fluorinated, at least partly hydrolyzed and condensed silane compound, this compound being part of the said mixture (A) of hydrolysable silanes, or (C) at leas…